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| SPX2811 10A Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed FEATURES * Adjustable Output Down To 1.2V * Output Current Of 10A * Low Dropout Voltage 1.1V Typ * Extremely Tight Load And Line Regulation * Current & Thermal Limiting * Standard 3-Terminal Low Cost TO-220 * Similar To Industry Standard LT1584 APPLICATIONS * Powering Intel Pentium P from +5V Supplies * Power PC Supplies * SMPS Post-Regulator * High Efficiency "Green" Computer Systems * High Efficiency Linear Power Supplies * Portable Instrumentation * Constant Current Regulators * Adjustable Power Supplies * Battery Charger PRODUCT DESCRIPTION The SPX2811 is a low power 10A adjustable and fixed voltage regulator that is very easy to use. It requires only two external resistors to set the output voltage for the adjustable version. The SPX2811 is designed for low voltage applications that offer lower dropout voltage and faster transient response. This device is an excellent choice for use in powering low voltage Microprocessor that require a lower dropout, faster transient response to regulate from +2.5V to 3.8V supplies and as a post regulator for switching supplies applications. The SPX2811 features low dropout of a maximum 1.2 volts. The SPX2811 offers full protection against over-current faults, reversed input polarity, reversed load insertion, and positive and negative transient voltage. On-Chip trimming adjusts the reference voltage to 1%. The IQ of this device flows into the load which increases efficiency. The SPX2811 is offered in a 3-Pin TO-220 and TO-263 package type, compatible with older 3 terminal regulators. For a 8A low dropout regulator refer to the SPX1584 datasheet. . PIN CONNECTIONS TO-263-3 (T) TO-220-3 (U) SPX2811 1 2 3 SPX2811 1 2 3 ADJ/GND VOUT VIN Top View ADJ/GND VOUT VIN Front View Rev. 10/30/00 SPX2811 ABSOLUTE MAXIMUM RATINGS Lead Temp. (Soldering, 10 Seconds) .............................. 300C Storage Temperature Range ............................ -65 to +150C Operating Junction Temperature Range SPX2811 Control Section..........................0C to +125C SPX2811 Power Transistor........................0C to +150C Operating Input Voltage ................................... 7V ELECTRICAL CHARACTERISTICS (NOTE 1) at IOUT = 10mA, Ta=25C, unless otherwise specified. Parameter Conditions SPX2811 Min 3.3V Version Output Voltage Reference Voltage Output Voltage Min. Load Current Line Regulation SPX2811-3.3V, 0IOUT 1.5A, 4.75VVIN7V SPX2811-1.5V (VIN -VOUT)3V, 10mAIOUT7A SPX2811-3.3, 0 IOUT5A, 4.75VVIN 7V Note 4 1.5V (VIN -VOUT)5.75V SPX2811-2.75VVIN 7V, IOUT=10mA, TJ=25C SPX2811-3.3, 4.75VVIN 7V, IOUT=0mA, TJ=25C Load Regulation SPX2811,10IOUT IFLA, (VIN-VOUT)=3V, TJ=25C SPX2811-3.3,0IOUT IFLA, VIN=5V, TJ=25C Dropout Voltage Current Limit Long Term Stability Thermal Regulation Temperature Stability Output Noise, RMS Thermal Resistance Junction-to-Case 10Hz to 10kHz TO-220 TO-263 Control Section Power Transistor Control Section Power Transistor IOUT=IFULLLOAD , VREF=1% SPX2811, VIN=7V TA=125C, 1000Hrs. SPX2811, 30ms pulse 11.0 3.270 3.240 1.238 1.225 3.270 3.235 Typ 3.3 1.250 3.300 5 0.005 0.005 0.005 0.005 0.05 0.005 0.05 0.005 1.1 12.0 0.3 0.004 0.5 0.003 0.65 2.7 0.65 2.7 1 0.020 Max 3.330 3.360 1.262 1.275 3.330 3.365 10 0.2 0.2 0.2 0.2 0.3 0.5 0.3 0.5 1.2 Units V V V mA % % V A % %/W % % VO C/W The Bold specifications apply to the full operating temperature range. Note 1: Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 2: A 10F output capacitor is required on SPX2811. Rev. 10/30/00 SPX2811 TYPICAL CHARACTERISTICS Rev. 10/30/00 SPX2811 TYPICAL APPLICATIONS VIN C1 IN SPX2811 ADJ OUT R1 VIN C1 OUT IN SPX2811 ADJ VREF C2 R1 VOUT LOAD VOUT = VREF (1 + R2 ) + IADJ R2 R1 R2 10A Current Output Regulator Typical Adjustable Regulator Intel PentiumTM 3.45V VIN +5V C1 ADJ R1 IN SPX2811 VCC OUT C2 R1 Powering Intel Pentium with SPX2811 Pentium Processor is a trademark of Intel Corp. Power PC is a trademark of IBM Corp. TM Rev. 10/30/00 SPX2811 ORDERING INFORMATION Ordering No. SPX2811AU SPX2811AU-3.3 SPX2811AT SPX2811AT-3.3 Precision 1% 1% 1% 1% Output Voltage Adj 3.3V Adj 3.3V Packages 3 Lead TO-220 3 Lead TO-220 3 Lead TO-263 3 Lead TO-263 Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Main Offices: 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 935-7600 FAX: (408) 934-7500 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. Rev. 10/30/00 |
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